Method for forming metal layer on surface of insulating plastic

Abstract

A method for forming a metal layer on a surface of an insulating plastic, includes attaching metal particles in a selected area of the surface of the insulating plastic, irradiating the selected area with a laser such that the selected area of the insulating plastic is fused to be mixed with the metal particles, and performing chemical plating to the selected area to form a metal layer in the selected area.

What is claimed is: 
     
         1 . A method for forming a metal layer on a surface of insulating plastic, comprising:
 step 1: attaching metal particles in a selected area of the surface of the insulating plastic;   step 2: performing laser irradiation to the selected area, such that the selected area of the insulating plastic is fused to be mixed with the metal particles; and   step 3: performing chemical plating for the selected area to form a metal layer on the selected area.   
     
     
         2 . The method of  claim 1 , wherein before the step  1 , surface roughening treatment is performed on the selected area, so as to enhance an attaching force of the metal particles to the insulating plastic. 
     
     
         3 . The method of  claim 2 , wherein the surface roughening treatment comprises irradiation by laser or immersion by a chemical solution. 
     
     
         4 . The method of  claim 1 , wherein the step 1 is performed by a method comprising spraying, daubing or bonding, so that the metal particles are attached to the selected area. 
     
     
         5 . The method of  claim 1 , wherein the insulating plastic is immersed in a solution having the metal particles, such that the metal particles are attached to the selected area. 
     
     
         6 . The method of  claim 1 , further comprising, between the step 2 and the step 3, activating the metal particles. 
     
     
         7 . The method of  claim 6 , further comprising, after the step 2 and before the step of activating, cleaning the insulating plastic, such that the metal particles on the surface of the insulating plastic except for the selected area are removed. 
     
     
         8 . The method of  claim 1 , further comprising, after the step 3, another chemical plating or electroplating is performed to the metal layer to form a plating layer. 
     
     
         9 . The method of  claim 1 , wherein after the step 2, a part of the metal particles is embedded in the insulating plastic, and a part of the metal particles is exposed on the surface of the insulating plastic. 
     
     
         10 . The method of  claim 1 , wherein the metal particles are active.